Primary battery.



Nb. 700,598. Patented May 20, I902.

M. M. BAIR.

PRIMARY BATTERY.

(Application filed Mar. 21, 1901) (No Model.) 2 Sheets8heet I.

21m MW W 'w: ncama P211111: cu Pno'rounm, WASMINGTON, u c.

' No. 700,598. Patented May20, 1902.

M. m. BAIR. PRIMARY BATTERY.

(Application filed Mm. 21, 1901. v (No Model.) 2 Sheets-Sheet 2.

UNITED STATES ATENT met.

MICHAEL MARTIN BAIR, OF LEVALLOIS-PERRET, FRANCE, ASSIGNOR TO SOCIETEANONYME LE CARBONE, OF LEVALLOIS-PERRET, NEAR PARIS,

FRANCE.

PRIIMARY BATTERY.

SPECIFICATION formingpart of Letters Patent No. 700,598, dated May 20,1902.

Application filed March 21, 1901. Serial No. 52,199. (No model.)

To ctZZ whom, it may-concern:

Be it known that I, MICHAEL MARTIN BAIR, carbon-manufacturer,a subjectof the German Emperor,residing at 33 Rue de Lorraine, Levallois-Perret,near Paris, in the Republic of France, have invented certain new anduseful Improvements Relating to Galvanic Cells or Batteries, of whichthe following is a specification.

This invention relates to galvanic cells or batteries of the kind thatare hermetically sealed and intended for use with motor-vehicles.Hitherto cells or batteries of this class have been so constructed thatwhen once hermetically sealed they cannotbe again conveniently openedtoenable the constituent elements to be taken apart for the purpose ofrecharging the cells when they become exhausted and be hermeticallysealed again.

It is the chief object of my invention to so construct the cells thatthey can be readily opened and the constituent elements taken apart andafter recharging can be equally readily put together and closed again.

According to myinvention I provide the cell with a detachable lid orcover, so arranged that it can be secured to the outer vessel of thecell or to the outer vessel and the porous chamber of the cell by anysuitable connec-' tion, such as screw-threads, clamps, catches, or othermeans that will firmly maintain the said lid or cover hermetically inplace and yet permit of its ready detachment.

Referring to the drawings, Figure 1 is a vertical section of a cellconstructed according to my invention. Fig. 2 is a plan thereof. Fig. 3is a vertical section of the outer vessel. Fig. at is a plan of saidvessel. Fig. 5 is a sectional elevation of the lid or cover of the cell,and Fig.0 is a side elevation of a modified construction of cell.

A is the detachable lid or cover, B the outer vessel, and C the innervessel. The inner vessel preferably comprises a canvas or other suitableporous bag or chamber C, containing one of the electrodes D of the celland a polarizing mixture E, consisting, preferably, of manganese dioxidand carbon, (preferably granulated retort-carbon.) The said porous bagor chamber is placed in the outer vessel B, which is preferably formedof zinc and may or may not constitute the other electrode of the cell.The bottom of the porous chamber is formed of a piece of insulatingmaterial 0, connected to The walls of the chamber by means of wires 0'or otherwise and having on its under side a groove or recess 0 thatengages with a nipple or projection b on the bottom of the outer vessel,thus insuring that the said bag or porous chamber is always maintainedcentral with respect to the outer vessel. The electrolyte employedconsists, preferably, of ammonium chlorid. The outer frame of the lid orcover A comprises a ring a, of ebonite or other suitable insulating material, provided with an annular recess a, with which the upper edge 0of the porous chamber engages by being doubled over a lip (t of saidrecess and is secured in position by means of parafiiu-wax and black Waxor other suitable insulating material F. The said ring is provided onits outer circumference with an interrupted screw thread a, which isadapted to engage with an interrupted female screw-thread 1), formed inthe upper part b of the outer vessel.

To furtherinsure a tight joint between the cover and the outer vessel, acollar 5 on the said outer vessel is formed with a groove or recess, inwhich is placed a packing ring G, of rubber or other suitable material,on which rests a shoulder or flange a onthe cover.

The cover or lid is retainedin its engaged position with the outervessel by means of a spring-clip H, that engages with notches a on theouterperiphery of the said lid or cover, or the said cover and the outervessel may be hermetically sealed or joined together by any othersuitable means which will permit them to be readily taken apart whenrequired and the cell recharged without injury to any of the parts.

In the modified construction of cellshown in Fig. 6 the upper part oftheoutervessellis 9 What I claim, and desire to secure by Letters Patentof the United States, is-

1. In a galvanic cell, the combination with the inner vessel ofa coverhaving an internal annular recess adapted to receive the edge of saidinner vessel, said cover moreover comprising an external annular frame,having an internal lip thereon over which said edge can be folded, andinsulating binding material for securing said inner vessel within saidannular frame, substantially as described.

2. In a galvanic cell, the combination of a detachable cover, the innerporous vessel connected to said cell, of a collar on the upper part ofthe casing of the cell, of an interrupted screw-thread on said collar,of a ring on said cover, of an interrupted screw-thread on said ringadapted to engage with the aforesaid screw-thread on the collar, of apackingring carried by said collar, of a shoulder on said cover adaptedto bear against said packing-ring, and of means for retaining theinterrupted screw-threaded ring in its closed position, substantially asand for the purpose specified.

3. In a galvanic cell, the combination of a detachable cover, aninternal lip thereon, an inner porous vessel or chamber in the form of acanvas sack or casing containing one of the electrodes, means fortightly securing the upper part of said sack or casing to the lip on thecover, a collar on the outer casing of the cell,of an in terru ptedscrew thread on said collar, a ring on said cover, an interruptedscrew-thread on said ring, a packing-rill g carried by said collar and ashoulder on said cover adapted to bear against said packingring, and ofmeans for retaining the interrupted screw-threaded ring in its closedposition, for the purpose specified.

4. In a galvanic cell, the combination of a detachable cover, aninternal lip thereon, an inner porous vessel or chamber in the form of acanvas sack or casing containing one of the electrodes, means fortightly securing the upper part of said sack or casing to the lip on thecover, a collar on the outer casing of the cellof an interruptedscrew-thread on said collar, a ring on said cover, an interruptedscrew-thread on said ring, a packing-ring carried by said collar, ashoulder on said cover adapted to bear against said packing-ring,corrugations on said cover, and a clip on said outer casingof the celladapted to engage with said corrugations, substantially as and for thepurpose specified.

5. In a galvanic cell, the combination with the detachable cover, theinner porous vessel or chamber the means for securing the upper part ofsaid porous vessel or chamber to the cover and the means forhermetically but detachably connecting the cover to the outer casing ofthe cell; of an internal projection on the bottom of said outer casingof the cell, and of a block of insulating material at the bottom of theinner porous vessel or chamber said block having a recess for thereception of said internal projection, substantially as and for thepurpose specified.

In testimony whereof I have hereunto set my hand, in presence of twosubscribing witnesses, this 11th day of March, 1901.

MICHAEL MARTIN BAIR.

Witnesses:

EDWARD P. MAOLEAN, ENRIQUE BAER.

